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2 | ** |
3 | ** Copyright (C) 2017 The Qt Company Ltd. |
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5 | ** |
6 | ** This file is part of the Qt Quick Controls 2 module of the Qt Toolkit. |
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35 | ****************************************************************************/ |
36 | |
37 | #include "qquickdefaultdial_p.h" |
38 | |
39 | #include <QtCore/qmath.h> |
40 | #include <QtGui/qpainter.h> |
41 | #include <QtQuick/private/qquickitem_p.h> |
42 | |
43 | QT_BEGIN_NAMESPACE |
44 | |
45 | QQuickDefaultDial::QQuickDefaultDial(QQuickItem *parent) : |
46 | QQuickPaintedItem(parent) |
47 | { |
48 | } |
49 | |
50 | qreal QQuickDefaultDial::progress() const |
51 | { |
52 | return m_progress; |
53 | } |
54 | |
55 | void QQuickDefaultDial::setProgress(qreal progress) |
56 | { |
57 | if (progress == m_progress) |
58 | return; |
59 | |
60 | m_progress = progress; |
61 | update(); |
62 | } |
63 | |
64 | QColor QQuickDefaultDial::color() const |
65 | { |
66 | return m_color; |
67 | } |
68 | |
69 | void QQuickDefaultDial::setColor(const QColor &color) |
70 | { |
71 | if (color == m_color) |
72 | return; |
73 | |
74 | m_color = color; |
75 | update(); |
76 | } |
77 | |
78 | void QQuickDefaultDial::paint(QPainter *painter) |
79 | { |
80 | if (width() <= 0 || height() <= 0) |
81 | return; |
82 | |
83 | QPen pen(m_color); |
84 | pen.setWidth(8); |
85 | pen.setCapStyle(Qt::FlatCap); |
86 | painter->setPen(pen); |
87 | |
88 | const QRectF bounds = boundingRect(); |
89 | const qreal smallest = qMin(a: bounds.width(), b: bounds.height()); |
90 | QRectF rect = QRectF(pen.widthF() / 2.0 + 1, pen.widthF() / 2.0 + 1, smallest - pen.widthF() - 2, smallest - pen.widthF() - 2); |
91 | rect.moveCenter(p: bounds.center()); |
92 | |
93 | // Make sure the arc is aligned to whole pixels. |
94 | if (rect.x() - int(rect.x()) > 0) |
95 | rect.setX(qCeil(v: rect.x())); |
96 | if (rect.y() - int(rect.y()) > 0) |
97 | rect.setY(qCeil(v: rect.y())); |
98 | if (rect.width() - int(rect.width()) > 0) |
99 | rect.setWidth(qFloor(v: rect.width())); |
100 | if (rect.height() - int(rect.height()) > 0) |
101 | rect.setHeight(qFloor(v: rect.height())); |
102 | |
103 | painter->setRenderHint(hint: QPainter::Antialiasing); |
104 | |
105 | const qreal startAngle = (140 + 90); |
106 | const qreal spanAngle = (m_progress * 280) * -1; |
107 | QPainterPath path; |
108 | path.arcMoveTo(rect, angle: startAngle); |
109 | path.arcTo(rect, startAngle, arcLength: spanAngle); |
110 | painter->drawPath(path); |
111 | |
112 | rect.adjust(xp1: -pen.widthF() / 2.0, yp1: -pen.widthF() / 2.0, xp2: pen.widthF() / 2.0, yp2: pen.widthF() / 2.0); |
113 | pen.setWidth(1); |
114 | painter->setPen(pen); |
115 | |
116 | path = QPainterPath(); |
117 | path.arcMoveTo(rect, angle: 0); |
118 | path.arcTo(rect, startAngle: 0, arcLength: 360); |
119 | painter->drawPath(path); |
120 | } |
121 | |
122 | QT_END_NAMESPACE |
123 | |